After much deliberation I finally ordered the 750's from Pricejapan.
It's actually the detachable cable that stopped me from getting the 850's... I think it could potentially be the first place where they would break, those huge connectors would probably make it difficult to wear them over ear and there's of course the price difference... At about $150 more + the cost of a better cable than the one provided and I might as well get customs...
I also ordered the Sony PHA-2 (only saw that nifty little JVC amp about an hour after i placed my order of course..) and some extra spiral eartips. Too bad it's those sold out eartips that delay the order by about two weeks. I do wonder where they all went...
Can't wait to finally hear that woody goodness though. I really wonder how they will sound out of the NWZ-ZX1 and what they will do for extreme music...